DNA Aptamer-Guided Glycomimetics for Developmental Stage-Specific Glycocalyx Engineering to Control Stem Cell...

Area of Science:

• Biochemistry
• Developmental Biology
• Biomaterials Science

Background:

• Heparan sulfate glycosaminoglycans regulate growth factor activity in stem cell development.
• Synthetic heparan sulfate mimetics offer a strategy for controlling stem cell signaling and differentiation.
• Current methods for stem cell glycocalyx engineering lack specificity and require genetic modification.

Purpose of the Study:

• To develop a specific heparan sulfate mimetic for targeting embryonic stem cells.
• To investigate the role of glycomimetic-enhanced growth factor binding in stem cell differentiation.
• To explore the therapeutic potential of targeted glycocalyx engineering.

Main Methods:

• Synthesized a heparan sulfate mimetic incorporating a DNA aptamer targeting alkaline phosphatase.
• Utilized the DNA aptamer for selective targeting of the mimetic to embryonic stem cell surfaces.
• Assessed fibroblast growth factor 2 (FGF2) recruitment and mitogen-activated protein kinase (MAPK) pathway activation.

Main Results:

• The DNA aptamer enabled selective targeting of the heparan sulfate mimetic to embryonic stem cells.
• Glycomimetic-enhanced FGF2 recruitment activated MAPK signaling.
• Targeted glycomimetic application promoted neural differentiation of stem cells.

Conclusions:

• A novel, stem cell-specific heparan sulfate mimetic was successfully developed.
• Targeted glycomimetic modification can effectively modulate stem cell signaling and differentiation.
• This approach holds promise for enhancing the therapeutic potential of stem cells.